Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
26/02/2024, 19:21
General
- Target Zzz.exe
- Size 3.1MB
- Sample240226-x2me9aec91
- SHA256 67870deb8caf1eccc37bf31e80e430ba3d9ed56b8d7ac872ad13b9cd6c19be38
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
86.13.66.89:4782
-
3dfd6d61-2c0f-458b-a97d-37fe57b259bb
-
encryption_key
589F5FEC14A79F2A51219FE310F3C5DFF0D522F7
-
install_name
Client.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
Client Startup
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 3 IoCs
- Executes dropped EXE 1 IoCs
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Users\Admin\AppData\Local\Temp\Zzz.exe"C:\Users\Admin\AppData\Local\Temp\Zzz.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Client.exe
Client.exe
memory/228-10-0x00007FFCA61C0000-0x00007FFCA6C81000-memory.dmp
memory/228-11-0x000000001B240000-0x000000001B250000-memory.dmp
memory/228-12-0x000000001BA00000-0x000000001BA50000-memory.dmp
memory/228-13-0x000000001BB10000-0x000000001BBC2000-memory.dmp
memory/228-14-0x00007FFCA61C0000-0x00007FFCA6C81000-memory.dmp
memory/228-15-0x000000001B240000-0x000000001B250000-memory.dmp
memory/808-0-0x0000000000590000-0x00000000008B4000-memory.dmp
memory/808-1-0x00007FFCA61C0000-0x00007FFCA6C81000-memory.dmp
memory/808-2-0x000000001B6B0000-0x000000001B6C0000-memory.dmp
memory/808-9-0x00007FFCA61C0000-0x00007FFCA6C81000-memory.dmp